From 1a8550332a7f0111306b6b34e44a7c696ef68c4d Mon Sep 17 00:00:00 2001 From: Bob Peterson Date: Wed, 29 Oct 2014 08:02:30 -0500 Subject: GFS2: If we use up our block reservation, request more next time If we run out of blocks for a given multi-block allocation, we obviously did not reserve enough. We should reserve more blocks for the next reservation to reduce fragmentation. This patch increases the size hint for reservations when they run out. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse --- fs/gfs2/rgrp.c | 3 +++ fs/gfs2/rgrp.h | 1 + 2 files changed, 4 insertions(+) (limited to 'fs/gfs2') diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index f4e4a0c5bab..9150207f365 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -2251,6 +2251,9 @@ static void gfs2_adjust_reservation(struct gfs2_inode *ip, trace_gfs2_rs(rs, TRACE_RS_CLAIM); if (rs->rs_free && !ret) goto out; + /* We used up our block reservation, so we should + reserve more blocks next time. */ + atomic_add(RGRP_RSRV_ADDBLKS, &rs->rs_sizehint); } __rs_deltree(rs); } diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h index 5d8f085f7ad..b104f4af3af 100644 --- a/fs/gfs2/rgrp.h +++ b/fs/gfs2/rgrp.h @@ -20,6 +20,7 @@ */ #define RGRP_RSRV_MINBYTES 8 #define RGRP_RSRV_MINBLKS ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY)) +#define RGRP_RSRV_ADDBLKS 64 struct gfs2_rgrpd; struct gfs2_sbd; -- cgit v1.2.3-70-g09d2